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Public Tours

The Observatory and gift shop are currently open with restrictions from 10 AM - 4 PM, Friday-Monday and every day by appointment from 8:30 AM to 5:30 PM.

Masks must be worn inside the Observatory. Whether visiting the gift shop or taking a tour, a maximum of four people (or up to six people all from the same household) are allowed at one time. Reservations for a visit at a specific time are encouraged by calling 617-696-0562 or by sending E-mail to dmccasland@bluehill.org. Tickets for tours may be purchased below.


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Please help us to continue delivering our Programs by making a donation directly through PayPal or by shopping with Giving Assistant:


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Weather Summaries

May 2021 Summary – Warmer and Wetter Than Average

May 2021 Summary – Warmer and Wetter Than Average

Blue Hill Observatory May 2021 Summary: May was generally warmer and wetter than average. The 24-hour adjusted mean temperature for the month of 57.7 deg F was 2.2 degrees warmer than the 1891-2020 130-year average for May, and it was 1.0 degrees warmer than the 1981-2010 30-year average. The average maximum temperature of 68.1 deg […]

| June 3, 2021 | Reply
April 2021 Summary – Warmer and Sunnier Than Average

April 2021 Summary – Warmer and Sunnier Than Average

Blue Hill Observatory April 2021 Summary: April was warmer and much sunnier than average. The 24-hour adjusted mean temperature for the month of 47.0 deg F was 2.1 degrees warmer than the 1891-2020 130-year average for April, and it was 0.7 degrees warmer than the 1981-2010 30-year average. The average maximum temperature of 57.2 deg […]

| May 10, 2021 | Reply

Weather Now

What's Happening on the Hill

Blue Hill Observatory’s last chance to secure MA state funding

Blue Hill Observatory’s last chance to secure MA state funding

We urgently need your help to ensure that our educational programs and the longest climate record in the United State can be continued. Right now, we have a last chance to secure MA State Funding for Blue Hill Observatory. Please take a few minutes to advocate for us and this critical financial support. FOR IMMEDIATE […]

| June 9, 2021 | Reply
Daily Record Snowfall at the Observatory on April 16th

Daily Record Snowfall at the Observatory on April 16th

A strong coastal storm combined with anomalously cold temperatures to bring a record breaking snowfall and more than two inches of much needed liquid precipitation to the summit of Great Blue Hill on April 16th, 2021. Rain began during the night, and snow started mixing with rain just before the 7AM EST observation. By 7:30AM, the […]

| April 16, 2021 | Reply
Observatory Open for Tours Through Late May/Early June 2021

Observatory Open for Tours Through Late May/Early June 2021

We are excited to announce that the major Observatory renovation project, which has been in the planning stages for several years, is underway. Extensive work will start in June that will require that we close to the public until some time in 2022. The building will get a much-needed rehab including concrete repair, historically appropriate […]

| April 3, 2021 | Reply
State of the Climate at Blue Hill Observatory: 2020

State of the Climate at Blue Hill Observatory: 2020

This report is an updated summary of the extensive annual and seasonal climate records of the Blue Hill Observatory that also documents the changes that have occurred in several key parameters over the entire period of record. This document is also available as a downloadable PDF file.     

| February 1, 2021 | Reply
Small Local Earthquake Observed on November 8th

Small Local Earthquake Observed on November 8th

Shortly after 9 AM EST on Sunday, November 8th, 2020 a small 3.6 magnitude earthquake shook parts of southeastern New England. The epicenter was about 6.2 miles below ground under Buzzard’s Bay and just offshore of Bliss Corner, in Dartmouth, Massachusetts. The earthquake was recorded on the seismographs at the Blue Hill Observatory and other […]

| November 9, 2020 | Reply